Middle Miocene closure of the Central American Seaway

doi:10.1126/science.aaa2815

. 2015 Apr 10;348(6231):226-9.

doi: 10.1126/science.aaa2815.

Middle Miocene closure of the Central American Seaway

C Montes¹, A Cardona², C Jaramillo³, A Pardo⁴, J C Silva⁵, V Valencia⁶, C Ayala⁷, L C Pérez-Angel⁸, L A Rodriguez-Parra⁸, V Ramirez⁹, H Niño⁹

Affiliations

¹ Universidad de los Andes, Bogotá, Colombia. cmontes@uniandes.edu.co.
² Universidad Nacional de Colombia, Medellín, Colombia.
³ Smithsonian Tropical Research Institute, Ciudad de Panamá, Panamá.
⁴ Universidad de Caldas, Manizales, Colombia.
⁵ University of Houston, Houston, TX 77004, USA.
⁶ Washington State University, Pullman, WA 99164, USA.
⁷ Corporación Geológica Ares, Bogotá, Colombia.
⁸ Universidad de los Andes, Bogotá, Colombia.
⁹ Ecopetrol, Bogotá, Colombia.

PMID: 25859042
DOI: 10.1126/science.aaa2815

Middle Miocene closure of the Central American Seaway

C Montes et al. Science. 2015.

. 2015 Apr 10;348(6231):226-9.

doi: 10.1126/science.aaa2815.

Authors

C Montes¹, A Cardona², C Jaramillo³, A Pardo⁴, J C Silva⁵, V Valencia⁶, C Ayala⁷, L C Pérez-Angel⁸, L A Rodriguez-Parra⁸, V Ramirez⁹, H Niño⁹

Affiliations

¹ Universidad de los Andes, Bogotá, Colombia. cmontes@uniandes.edu.co.
² Universidad Nacional de Colombia, Medellín, Colombia.
³ Smithsonian Tropical Research Institute, Ciudad de Panamá, Panamá.
⁴ Universidad de Caldas, Manizales, Colombia.
⁵ University of Houston, Houston, TX 77004, USA.
⁶ Washington State University, Pullman, WA 99164, USA.
⁷ Corporación Geológica Ares, Bogotá, Colombia.
⁸ Universidad de los Andes, Bogotá, Colombia.
⁹ Ecopetrol, Bogotá, Colombia.

PMID: 25859042
DOI: 10.1126/science.aaa2815

Abstract

Uranium-lead geochronology in detrital zircons and provenance analyses in eight boreholes and two surface stratigraphic sections in the northern Andes provide insight into the time of closure of the Central American Seaway. The timing of this closure has been correlated with Plio-Pleistocene global oceanographic, atmospheric, and biotic events. We found that a uniquely Panamanian Eocene detrital zircon fingerprint is pronounced in middle Miocene fluvial and shallow marine strata cropping out in the northern Andes but is absent in underlying lower Miocene and Oligocene strata. We contend that this fingerprint demonstrates a fluvial connection, and therefore the absence of an intervening seaway, between the Panama arc and South America in middle Miocene times; the Central American Seaway had vanished by that time.

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Comment in

Geology. An early start for the Panama land bridge.
Hoorn C, Flantua S. Hoorn C, et al. Science. 2015 Apr 10;348(6231):186-7. doi: 10.1126/science.aab0099. Science. 2015. PMID: 25859033 No abstract available.
Rethinking migration.
Willis CG, Davis CC. Willis CG, et al. Science. 2015 May 15;348(6236):766. doi: 10.1126/science.348.6236.766-a. Science. 2015. PMID: 25977541 No abstract available.

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Middle Miocene closure of the Central American Seaway

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Middle Miocene closure of the Central American Seaway

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